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Radeon HD 4830 512MB vs Radeon HD 6670 (OEM)

Intro

The Radeon HD 4830 512MB features a GPU core clock speed of 575 MHz, and the 512 MB of GDDR3 RAM is set to run at 900 MHz through a 256-bit bus. It also is comprised of 640(128x5) SPUs, 32 Texture Address Units, and 16 ROPs.

Compare all that to the Radeon HD 6670 (OEM), which features a GPU core clock speed of 800 MHz, and 512 MB of GDDR5 memory set to run at 1000 MHz through a 128-bit bus. It also features 480 Stream Processors, 24 Texture Address Units, and 8 Raster Operation Units.

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Memory Bandwidth

As far as performance goes, the Radeon HD 6670 (OEM) should theoretically be a small bit superior to the Radeon HD 4830 512MB in general. (explain)

Radeon HD 6670 (OEM)

64000 MB/sec

Radeon HD 4830 512MB

57600 MB/sec

Difference: 6400 (11%)

Texel Rate

The Radeon HD 6670 (OEM) should be a small bit (more or less 4%) better at AF than the Radeon HD 4830 512MB. (explain)

Radeon HD 6670 (OEM)

19200 Mtexels/sec

Radeon HD 4830 512MB

18400 Mtexels/sec

Difference: 800 (4%)

Pixel Rate

If using a high resolution is important to you, then the Radeon HD 4830 512MB is a better choice, by a large margin. (explain)

Radeon HD 4830 512MB

9200 Mpixels/sec

Radeon HD 6670 (OEM)

6400 Mpixels/sec

Difference: 2800 (44%)

Please note that the above 'benchmarks' are all just theoretical - the results were calculated based on the card's specifications, and real-world performance may (and probably will) vary at least a bit.

Radeon HD 4830 512MB

Radeon HD 6670 (OEM)

Please note that the price comparisons are based on search keywords - sometimes it might show cards with very similar names that are not exactly the same as the one chosen in the comparison. We do try to filter out the wrong results as best we can, though.

Memory Bandwidth: Memory bandwidth is the max amount of information (measured in MB per second) that can be transferred past the external memory interface in a second. It is calculated by multiplying the interface width by the speed of its memory. If the card has DDR type memory, the result should be multiplied by 2 once again. If it uses DDR5, multiply by ANOTHER 2x.
The better the bandwidth is, the better the card will be in general. It especially helps with anti-aliasing, HDR and high resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that can be processed per second. This number is worked out by multiplying the total texture units by the core clock speed of the chip. The better the texel rate, the better the card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels in one second.

Pixel Rate: Pixel rate is the maximum number of pixels the graphics card could possibly write to its local memory in a second - measured in millions of pixels per second. The figure is calculated by multiplying the number of Render Output Units by the clock speed of the card. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for outputting the pixels (image) to the screen.
The actual pixel fill rate is also dependant on quite a few other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the ability to reach the max fill rate.

Radeon HD 4830 512MB

Radeon HD 6670 (OEM)

Please note that the price comparisons are based on search keywords - sometimes it might show cards with very similar names that are not exactly the same as the one chosen in the comparison. We do try to filter out the wrong results as best we can, though.